<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>【案例】筛选数组</title>
    <script>
        var arr = [1500,1200,2000,2100,1800];
        var newArr = [];
        for( var i = 0;i < arr.length; i++){
            if(arr[i] < 2000){
                newArr.push(arr[i]);
            }
        }
        console.log(newArr);
    </script>
</head>
<body>

</body>
</html>